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ars w <br /> ;f, > <br /> Geofogica(TechnWS Inc. <br /> 2741 River Read <br /> MDAto,Ca(yknia 95351 <br /> (209)538-64241,-a,C#538-5852 <br /> REPORT <br /> -� Groundwater Monitoring <br /> Spring Quarter 1996 <br /> C & B Equipment <br /> 7474 West 11th Street <br /> = Tracy, California <br /> Project No. 336.2 <br /> April 25, 1997 <br /> EXECUTIVE SUMMARY <br /> This report summarizes the Spring Quarter 1997 round of groundwater monitoring and <br /> testing that took place on March 28, 1997. The test results show that detectable <br /> concentrations of the aromatic hydrocarbon compounds (BTEX-) and gasoline range <br /> petroleum hydrocarbons (TPH-G) are present in two monitoring wells (MW-2 & 3). <br /> However, these samples were probably misidentified and as a result are suspect. MTBE was <br /> not tested for this event. <br /> The groundwater level has fluctuated about 0.02 feet since December 1996. Site specific <br /> gradient and bearing measurements and calculations show that groundwater flows in a north- <br /> northwesterly direction at approximately 0.00405 ft/ft. <br /> _:- 1.0 GROUNDWATER MONITORING <br /> 1.1 Hydrology of Site <br /> _ Limited sampling has occurred at this site, July and September of 1995, December 1996 and <br /> =1 March 1997. During these events groundwater levels have remained fairly constant. <br /> On March 28, 1997 depths to water were measured in MW-1, MW-2 and MW-3. The <br /> groundwater elevation, gradient and direction were calculated. The average elevation was <br />